Laurel Electronics LTM DPM SERIES ANALOG INPUT, SERIAL DATA OUTPUT - Manual (Page 6)

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6. TRANSMITTER FIELD WIRING
Signal
conditioner
board
P3 Solid
state relays
P1 Power
input
P6 Signal
input &
excitation
output
P2 Serial
data I/O
P4 Analog
output
1
2
3
4
5
6
See manuals
for different
signal types
AL2 1
AL2 2
AL1 3
AL1 4
RS485
6 N/C
5 ARX
4 ATX
3 GND
2 BRX
1 BTX RS232
TX
RX
NC
GND
GND
N/C
3 Power GND
2 AC neutral or -DC
1 AC high or +DC
6 TX
5 RX
4 NC
3 GND
2 BRX
1 N/C
5
4
3
2
1
9
8
7
6
RS232 wiring
6 N/C
5 ARX
4 ATX
3 GND
2 BRX
1 BTX
Transmitter Master
6 N/C
5 ARX / ATX
4 N/C
3 GND
2 BRX / BTX
1 N/C
Transmitter Master
ATX
ARX
GND
BTX
BRX
ATX / ARX
GND
BTX / BRX
RS485 wiring, full duplex -
RS485 wiring, half duplex
with internal jumpers.
Transmitter
DB9 connector
to PC
(rear view)
6 N/C
5 ARX
4 ATX
3 GND
2 BRX
1 BTX
Transmitter Master
ATX / ARX
GND
BTX / BRX
RS485 wiring, half duplex
with external jumpers.
Analog out - 1
Analog out + 2